/*
 *    Copyright 2009-2012 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.datasource.unpooled;

import java.util.Properties;

import javax.sql.DataSource;

import org.apache.ibatis.datasource.DataSourceException;
import org.apache.ibatis.datasource.DataSourceFactory;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;

/**
 * @author Clinton Begin
 */
public class UnpooledDataSourceFactory
		implements DataSourceFactory {

	private static final String DRIVER_PROPERTY_PREFIX = "driver.";
	private static final int DRIVER_PROPERTY_PREFIX_LENGTH = DRIVER_PROPERTY_PREFIX
			.length();

	protected DataSource dataSource;

	public UnpooledDataSourceFactory() {
		this.dataSource = new UnpooledDataSource();
	}

	public void setProperties(
			Properties properties) {
		Properties driverProperties = new Properties();
		MetaObject metaDataSource = SystemMetaObject
				.forObject(dataSource);
		for (Object key : properties
				.keySet()) {
			String propertyName = (String) key;
			if (propertyName
					.startsWith(DRIVER_PROPERTY_PREFIX)) {
				String value = properties
						.getProperty(propertyName);
				driverProperties
						.setProperty(
								propertyName
										.substring(DRIVER_PROPERTY_PREFIX_LENGTH),
								value);
			} else if (metaDataSource
					.hasSetter(propertyName)) {
				String value = (String) properties
						.get(propertyName);
				Object convertedValue = convertValue(
						metaDataSource,
						propertyName,
						value);
				metaDataSource
						.setValue(
								propertyName,
								convertedValue);
			} else {
				throw new DataSourceException(
						"Unknown DataSource property: "
								+ propertyName);
			}
		}
		if (driverProperties.size() > 0) {
			metaDataSource.setValue(
					"driverProperties",
					driverProperties);
		}
	}

	public DataSource getDataSource() {
		return dataSource;
	}

	private Object convertValue(
			MetaObject metaDataSource,
			String propertyName,
			String value) {
		Object convertedValue = value;
		Class<?> targetType = metaDataSource
				.getSetterType(propertyName);
		if (targetType == Integer.class
				|| targetType == int.class) {
			convertedValue = Integer
					.valueOf(value);
		} else if (targetType == Long.class
				|| targetType == long.class) {
			convertedValue = Long
					.valueOf(value);
		} else if (targetType == Boolean.class
				|| targetType == boolean.class) {
			convertedValue = Boolean
					.valueOf(value);
		}
		return convertedValue;
	}

}
